Revert "Balder/add native fadvise"

1 files changed, 0 insertions, 87 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/io/NativeIO.java b/vespajlib/src/main/java/com/yahoo/io/NativeIO.java
deleted file mode 100644
index bee43a8653e..00000000000
--- a/vespajlib/src/main/java/com/yahoo/io/NativeIO.java
+++ /dev/null
@@ -1,87 +0,0 @@
-package com.yahoo.io;
-
-import java.io.File;
-import java.io.FileDescriptor;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-import java.lang.reflect.Field;
-import java.util.logging.Logger;
-
-import com.sun.jna.LastErrorException;
-import com.sun.jna.Native;
-import com.sun.jna.Platform;
-
-public class NativeIO {
-    private final Logger logger = Logger.getLogger(getClass().getName());
-    private static final int POSIX_FADV_DONTNEED = 4; // See /usr/include/linux/fadvise.h
-    private static boolean initialized = false;
-    private static Throwable initError = null;
-    static {
-        try {
-            if (Platform.isLinux()) {
-                Native.register(Platform.C_LIBRARY_NAME);
-                initialized = true;
-            }
-        } catch (Throwable throwable) {
-            initError = throwable;
-        }
-    }
-
-    private static final Field fieldFD = getField(FileDescriptor.class, "fd");
-
-
-    private static native int posix_fadvise(int fd, long offset, long len, int flag) throws LastErrorException;
-
-    public NativeIO() {
-        if (!initialized) {
-            logger.warning("native IO not possible due to " + getError().getMessage());
-        }
-    }
-
-    public boolean valid() { return initialized; }
-    public Throwable getError() {
-        if (initError != null) {
-            return initError;
-        } else {
-            return new RuntimeException("Platform is unsúpported. Only supported on linux.");
-        }
-    }
-
-    public void dropFileFromCache(FileDescriptor fd) {
-        if (initialized) {
-            posix_fadvise(getNativeFD(fd), 0, 0, POSIX_FADV_DONTNEED);
-        }
-    }
-
-    public void dropFileFromCache(File file) {
-        try {
-            dropFileFromCache(new FileInputStream(file).getFD());
-        } catch (FileNotFoundException e) {
-            throw new RuntimeException(e);
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-
-    private static Field getField(Class<?> clazz, String fieldName) {
-        Field field;
-        try {
-            field = clazz.getDeclaredField(fieldName);
-        } catch (NoSuchFieldException e) {
-            throw new RuntimeException(e);
-        }
-        field.setAccessible(true);
-        return field;
-    }
-
-    private static int getNativeFD(FileDescriptor fd) {
-        try {
-            return fieldFD.getInt(fd);
-        } catch (IllegalAccessException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-}